GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 19 Oct 2019, 00:11 GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.  If n is a positive integer, the sum of the integers from 1 to n, inclu

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

Hide Tags

Senior PS Moderator V
Joined: 26 Feb 2016
Posts: 3333
Location: India
GPA: 3.12
If n is a positive integer, the sum of the integers from 1 to n, inclu  [#permalink]

Show Tags 00:00

Difficulty:   25% (medium)

Question Stats: 78% (01:18) correct 23% (01:37) wrong based on 43 sessions

HideShow timer Statistics

If n is a positive integer, the sum of the integers from 1 to n, inclusive, equals $$\frac{(n(n+1))}{2}$$ Which of the following equals the sum of the integers from 1 to 2n, inclusive?

A. $$n(n+1)$$

B. $$\frac{(n(2n+1))}{2}$$

C. $$n(2n+1)$$

D. $$2n(n+1)$$

E. $$2n(2n+1)$$

_________________
You've got what it takes, but it will take everything you've got

Originally posted by pushpitkc on 30 Oct 2018, 01:08.
Last edited by Bunuel on 30 Oct 2018, 01:12, edited 1 time in total.
Edited the question.
CEO  D
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2978
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Re: If n is a positive integer, the sum of the integers from 1 to n, inclu  [#permalink]

Show Tags

pushpitkc wrote:
If n is a positive integer, the sum of the integers from 1 to n, inclusive, equals $$\frac{(n(n+1))}{2}$$ Which of the following equals the sum of the integers from 1 to 2n, inclusive?

A. $$n(n+1)$$

B. $$\frac{(n(2n+1))}{2}$$

C. $$n(2n+1)$$

D. $$2n(n+1)$$

E. $$2n(2n+1)$$

sum of the integers from 1 to n, inclusive, equals $$\frac{(n(n+1))}{2}$$

Replacing $$n$$ by $$2n$$

sum of the integers from 1 to $$2n$$, inclusive, equals $$\frac{(2n(2n+1))}{2} = n(2n+1)$$

_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION Re: If n is a positive integer, the sum of the integers from 1 to n, inclu   [#permalink] 30 Oct 2018, 01:29
Display posts from previous: Sort by

If n is a positive integer, the sum of the integers from 1 to n, inclu

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne  